99% High Alumina Ball for Ethylene Dryers 1.20 years professional ... ,13,19,25,38,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media ... ), it's a very excellent and ideal product for high temperature and steam applications, such as secondary ... 1550°C , also it's a good choice for heat retention or equilibration media. Chemical composition Al2O3Fe2O3MgOSiO2Na2OTiO2> ...